Bluetrek will release the first water-resistant Bluetooth headset, the Bluetrek X2, in March. Costing a little less than a C note, it'll allow for 14 hours of wet and wild talk time, an impressive 500 hours of standby time, and has an operational range of about 11 yards. The X2, designed with active individuals in mind, fits to your ear with a customizable system of loops and hooks made of "anti-allergenic" silicone rubber to reduce skin irritation. For sweaty types, the X2 is probably a safer way to broker business deals during a game of b-ball.
First Water Resistant Bluetooth Headset, via uber gizmo